September weather forecastStewartville, MN
September
Weather in September
Stewartville's weather cools down in September with a notable decrease in temperature to 70.7°F (21.5°C), signaling the onset of autumn. There's a remarkable reduction in rainfall and a return of snowfall, albeit slight, indicating a transition into the colder season. While daylight hours decrease, sunny conditions remain prevalent fostering pleasant autumnal activities. Timely winds facilitate the dispersal of fallen leaves, creating a picturesque autumn landscape. The clear horizons and changing foliage make September a visually appealing month.Temperature
September indicates a minor shift in the average high-temperature, from August's warm 76.6°F (24.8°C) to an agreeable 70.7°F (21.5°C). Throughout the month of September, Stewartville expects an average low of 52°F (11.1°C).Humidity
In Stewartville, the average relative humidity in September is 79%.Rainfall
In September, the rain falls for 9.5 days. Throughout September, 1.3" (33mm) of precipitation is accumulated. In Stewartville, during the entire year, the rain falls for 109.7 days and collects up to 16.57" (421mm) of precipitation.Snowfall
In Stewartville, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 29min.On the first day of September, sunrise is at 6:34 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 6:52 pm CDT.
Sunshine
In Stewartville, the average sunshine in September is 8.6h.UV index
In Stewartville, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: A maximum daily UV index of 4 during September morphs into the following directions:
Take measures. Individuals with light skin might experience burns in under 30 minutes. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Stewartville, MN
- Average high temperature in September: 70.7°F
The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is January (20.7°F).
- Average low temperature in September: 52°F
The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (7.7°F).
Average pressure in September
Stewartville, MN
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Stewartville, MN
- Average wind speed in September: 8.6mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (7.5mph).
Average humidity in September
Stewartville, MN
- Average humidity in September: 79%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is October (74%).
Average rainfall in September
Stewartville, MN
- Average rainfall in September: 1.3"
The wettest month (with the highest rainfall) is June (3.11").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in September
Stewartville, MN
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is June (15.3 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in September
Stewartville, MN
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.09").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Stewartville, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Stewartville, MN
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 8h and 36min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in September
Stewartville, MN
- Average sunshine days in September: 17.9 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is June (11.2 days).
Average UV index in September
Stewartville, MN
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
Stewartville, MN
- Average cloud cover in September: 36
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Stewartville, MN
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
